Deleting Custom Moods

I’m running Syrinscape on an iPad and what’s happening is that every time I download a new soundset, all of the custom moods I’ve created in the CURRENT session, disappear. Custom Moods created in previous sessions remain.

What’s going on and how do I prevent this from happening?

I have the same problem on Windows 10. But at least thanks to you I know how to save them, because I didn’t notice it’s tied to the session. I was always recreating them.